Plazma's benefit is not 'getting a better pump'. It's not that kind of supplement, in my opinion, it's much better than that. Plazma will greatly aid in speed of recovery, it will make your workouts more effective in terms of muscular and strength gains, and it will improve your work capacity while in the gym.
Also, as far as dosing goes, if you can afford to use it as according to the label, do so. But if you can't (I can't), it's still very effective at just 1 scoop per workout. That's what I do. 1 scoop during the workout, and something like Mag-10 afterward. Or another scoop of Plazma. Or Surge Recovery. But definitely the Plazma during workouts. I can't remember the last time I lifted without it.